Electrical Adjustment - Sony ICF-C215 Service Manual

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3 7 63 1515 0
TUNER SECTION
AM/LW Section
Procedure :
BAND
VOLUME : MIN
AM RF signal
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
FM Section
Procedure :
BAND
VOLUME : MIN
FM RF signal
generator
22.5kHz frequency deviation by
TE 400Hz signal.
L 13942296513
Output level : as low as possible
set
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ELECTRICAL ADJUSTMENTS
: AM (C215)
LW (C215L)
Put the lead-wire
antenna close to
the set.
: FM
0.01µF
level meter
32 Ω
speaker terminal
x ao
y
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SECTION 3
8
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
T1
C215
AM FREQUENCY COVERAGE ADJUSTMENT
L4
CT4
L1
CT1
C215L
LW FREQUENCY COVERAGE ADJUSTMENT
L4
CT6
antenna
terminal
(JW1)
Q Q
3 6 7 1 3
L1
CT5
FM FREQUENCY COVERAGE ADJUSTMENT
L3
CT3
L2
CT2
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– 7 –
2 9 9 4 2 8
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AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
455kHz
Adjust for a maximum reading on level meter.
520kHz <516.5kHz>
1,750kHz <1631.5kHz>
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
620kHz
1,400kHz
Adjust for a maximum reading on level meter.
140kHz
240kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
1 5 0 5 8 2 9 9 4
140kHz
240kHz
Adjust for a maximum reading on level meter.
86.5MHz <87.35MHz>
109.5MHz <108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
86.5MHz <87.35MHz>
109.5MHz <108.25MHz>
m
co
9 9
> : Italian model
2 8 9 9